Avg Internet Security Vs Avg Antivirus

I had used AVG Antivirus free long time ago for a long period before USB infections started to propagate. Then I switched to Kaspersky Antivirus and then Kaspersky Internet security. Now I am back at AVG Internet security. Now The Internet Security is a whole package including Antivirus also, but Antivirus is just Antivirus with less features which might not protect you from malwares or spywares fully.